I once got one of the Irish Lottery scam ones... I played them along sending them retarded questions and setting up a meeting in their 'offices' in Dublin (an address that was an abandoned building). The actual scam was based on the ludicrous 'courier fee' that they charged for sending the certified cheque for my 'winnings' (€11,000,000 and some change) to my then address in England. Of course, the cheque could be collected in person (from this ficticious office), in which case there was no delivery fee, but a 'processing fee' of some €500.
Obviously I did not go to Dublin, but the day after the supposed meeting, I asked them what had happened to their office... They gave me a new address in Dublin and claimed that they had recently relocated and had been using email 'forms' that had not been updated.
It amazed me at how persistent these fuckers were. They even suggested I take out a loan to pay for the 'courier fee'!
One activity that gives me great amusement these days is to forward letters from Nigeria to email accounts from which I have recieved other letters from Nigeria. I gives me a nice warm feeling thinking that maybe these people would like to get together and have their own online community - into which a few fucks can occasionally be fired by concerned citizens.